AMD Opteron Server 4U/Twr/U320/760watt Redundant      Manufacturer: SuperMicro  Model Number: AW4020A-8RB Starting @ $5800   Description Processor/Chipset CPU Dual 940-pin ZIF Sockets Supports up to two Dual-Core AMD Opteron™ 200 Series processor(s) VRM x3 Chipset AMD 8131 HyperTransport PCI-X Tunnel AMD 8111 HyperTransport I/O Hub System Memory Memory Capacity Eight 184-pin DIMM sockets Supports up to 16 GB DDR 400 MHz memory or Supports up to 16 GB DDR 333 MHz memory or Supports up to 32 GB DDR 266 MHz memory Single or Dual (recommended) channel memory For Single CPU: Memory must be populated in CPU1 DIMMs only For Dual CPUs: Recommended that memory be populated equally in adjacent memory banks Memory Type DDR 400/333/266MHz buffered (registered) ECC SDRAM 72-bit, 184-pin gold-plated DIMMs DIMM Sizes 256 MB, 512 MB, 1GB, 2GB, 4GB** Memory Voltage 2.5 V only Error Detection Corrects single-bit errors Detects double-bit errors (using ECC memory) On-Board Devices SCSI Adaptec AIC-7902W Controller Ultra320 SCSI with Host RAID (Host RAID only supports 4 drives) Host RAID 0, 1, 10, JBOD Zero Channel RAID Support for Zero-Channel RAID with Adaptec 2010S SCSI ZCR Card or AOC-LPZCR1 (Card not included) IPMI 1U support for Intelligent Platform Management Interface v.2.0 (Optional: 1UIPMI-B) 2U, 3U, 4U support for Intelligent Platform Management Interface v.2.0, Low Profile (Optional: AOC-LPIPMI) RMM (Remote Management Module) (Card not included) Network Controllers Broadcom® 5704 Dual Port Gigabit Ethernet Controller Supports 10BASE-T, 100BASE-TX, and 1000BASE-T, RJ45 output VGA ATI Rage XL 8MB PCI Graphics Controller Expansion Slots PCI-X 2 64-bit 133/100MHz PCI-X (3.3V) slots 2 64-bit 66MHz PCI-X (3.3V) slots PCI 2 32-bit 33MHz PCI (5V) slots IPMI IPMI 2.0 expansion slot Input / Output IDE Dual ATA 133/100 EIDE channels support up to four UDMA IDE devices Floppy 1 Floppy port; 1.44 MB, 2.88 MB, 3-mode support LAN 2 RJ45 LAN ports USB FUCI Up to 5 USB Ports 1.1 Compliant Keyboard / Mouse PS/2 keyboard and mouse ports Serial Ports 2 Fast UART 16550 serial ports Chassis Form Factor Tower / 4U Rackmountable Optional Rackmount Kit (CSE-PT26) Model SC743S1-R760 Dimensions Height 7.0" (178mm) Width 17.2" (437mm) Depth 25.5" (648mm) Gross Weight 65.5 lbs (29.71kg) Available Colors Beige, Black Front Panel Buttons Power On/Off button System Reset button LEDs Power LED Hard drive activity LED 2x Network activity LEDs System Overheat LED Power Fail LED Ports 2x USB Ports Drive Bays Hot-swap 8x 1" SCA Ultra320/160 Hot-swap Drives Peripheral Bay(s) 2x 5.25" Peripheral Drive Bay 1x 5.25" Bay For Floppy Drive Peripheral Drives Floppy Panasonic 3.5" 1.44MB Floppy Drive SCSI Backplane Single-Channel SCSI Hard Drive Backplane System Cooling Fans 4x 5000 RPM Hot-Swappable Cooling Fans 2x 5000 RPM Hot-Swappable Rear Exhaust Fan Power Supply 760W Triple-Redundant AC power supply with PFC [ 24-pin, (8-pin, 4-pin)=12V ]